NAME

netgroup − list of network groups

DESCRIPTION

netgroup defines network-wide groups, used for permission checking when doing remote mounts, remote logins, and remote shells.  For remote mounts, the information in netgroup is used to classify machines; for remote logins and remote shells, it is used to classify users.  Each line of the netgroup file defines a group and has the ­format:

 groupname member1 member2 .... 

where membern is either another group name or a triple:

 (hostname, username, domainname)

Any of three fields can be empty, in which case it signifies a “wild card.” Thus:

 universal (,,)

defines a group to which everyone belongs.  Field names that begin with something other than a letter, digit, or underscore (such as “−”) work in exactly the opposite fashion.  For example, consider the following entries:

 justmachines(analytic,−,sun)
 justpeople(−,babbage,sun)

The machine, analytic, belongs to the group, justmachines, in the domain, sun, but no users belong to it. Similarly, the user, babbage, belongs to the group, justpeople, in the domain, sun, but no machines belong to it.

Network groups are contained in the network information service and are accessed through these files:

 /etc/yp/domainname/netgroup.dir
 /etc/yp/domainname/netgroup.pag
 /etc/yp/domainname/netgrp.usr.dir
 /etc/yp/domainname/netgrp.usr.pag
 /etc/yp/domainname/netgrp.hst.dir
 /etc/yp/domainname/netgrp.hst.pag

These files can be created from /etc/netgroup using makedbm(1M).

FILES

/etc/netgroup
/etc/yp/domainname/netgroup.dir
/etc/yp/domainname/netgroup.pag
/etc/yp/domainname/netgrp.usr.dir
/etc/yp/domainname/netgrp.usr.pag
/etc/yp/domainname/netgrp.hst.dir
/etc/yp/domainname/netgrp.hst.pag

BUGS

This file is dependent on the network transport mechanism used. 

SEE ALSO

makedbm(1M), ypserv(1M), ypmapxlate(4) in the INTER­ACTIVE Network Information Service Guide.

\*U  —  Version 1.0